Multi-image led projector for sequentially projecting a series of transparency images onto a screen

a projector and led projector technology, applied in the field of multi-image led projectors, can solve the problems of high power requirements, large size, high weight, etc., and achieve the effect of improving the quality of the projected imag

Inactive Publication Date: 2013-03-26
KLEIN ERIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]A single image LED projector holds a mounted frame of developed transparency film in a position called the object plane. The LED includes a condenser system, comprising a curved reflector below and a curved refractor above, that collects light from the LED lamp and focuses it on the object plane. The filtered light is projected and focused onto a screen by a projection lens. A second lens, placed between the LED and the film or between the film and the projection lens, greatly improves the quality of the projected image.
[0015]The multiple image LED projector c...

Problems solved by technology

These techniques are highly effective but have drawbacks such as high weight, large siz...

Method used

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  • Multi-image led projector for sequentially projecting a series of transparency images onto a screen
  • Multi-image led projector for sequentially projecting a series of transparency images onto a screen
  • Multi-image led projector for sequentially projecting a series of transparency images onto a screen

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Embodiment Construction

[0028]FIG. 1a is a perspective view of an assembled multi-LED projection module 20, secured together as a housing 20a.

[0029]FIG. 1b is an exploded perspective view of the multi-LED projection module. A number of through-hole light emitting diodes (LEDs) 22 are mounted on a printed circuit board (PCB) 30. A light shield spacer 33a surrounds the LEDs. The light shield spacer comprises a rectangular block pierced with holes corresponding in number, placement and size to the LEDs; it may be part of the housing 20a or the housing could comprise an outer element, not shown. A light filtering multi-panel transparency image film 26 is positioned above the LEDs. The sheet 26 is in a plane parallel to the plane of the light sources 22. A second light shield spacer 33b is positioned above the image film. A multi-element condenser lens array 29 is positioned above the image film. A third light shield spacer 33c is positioned between the condenser lens array and a multi-element projection lens ...

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Abstract

A multiple image LED projector comprises an array of LED elements directing light beams through a multi-frame image film focused by an array of lenses onto the same position on a projection surface. By lighting the LEDs in sequence, a slide show or animation sequence is projected onto the projection surface. The sequence can be played in reverse, or in different order of images for different effects.

Description

[0001]This application claims priority from provisional application No. 61 / 211,320, filed Mar. 30, 2009.BACKGROUND OF THE INVENTION[0002]LED flashlights comprise one or more LEDs, one or more batteries, a power switch, and housing. These flashlights may direct their light through a mounted frame of developed film and a projection lens to produce a colored image that can be projected onto an exterior flat surface for viewing.[0003]A projector is a device that uses light to produce an image on a reflective or translucent screen. Slide projectors cast single images while movie projectors cast multiple images sequenced to create the illusion of movement.[0004]Miniature toy projectors have been developed that utilize an LED shining through a slide to project a single fixed image. A series of images forming a slide show or generating an animated image would produce a more compelling toy. Currently existing slide and movie projectors shine light either through a series of film frames movin...

Claims

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Application Information

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IPC IPC(8): H01L27/00
CPCG03B21/001G03B21/2013G03B21/2033G03B25/00
Inventor KLEIN, ERIC
Owner KLEIN ERIC
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